Xmind - Xmind is a brainstorming and mind mapping application.

myOpenLab - MyOpenLab is a platform for finished elements (program components) that can be linked together.

MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.

PyLab_Works - PyLab_Works is a free and open source replacement for LabView + MatLab, written in pure Python.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

LabVIEW - LabVIEW offers many of the functions you'd find in a traditional script-based programming language presented in a more intuitive visual interface ideal fo engineering.